Discover on this page all our range of valves and rocker arms for your quad ARCTIC CAT / TEXTRON TBX 500 4. All the parts we offer are available, in stock and of high quality. Find adaptable or original parts. Many brands are available on our site (Polini, Top Performances, Fifty Moto Parts, Artek, Athena, Airsal, Bidalot, Malossi... etc).